diff -r 967af1815967 Lib/enum.py
--- a/Lib/enum.py	Mon Sep 09 18:48:24 2013 -0500
+++ b/Lib/enum.py	Tue Sep 10 17:06:15 2013 +0800
@@ -257,6 +257,9 @@
     def __iter__(cls):
         return (cls._member_map_[name] for name in cls._member_names_)
 
+    def __reversed__(cls):
+        return (cls._member_map_[name] for name in reversed(cls._member_names_))
+
     def __len__(cls):
         return len(cls._member_names_)
 
diff -r 967af1815967 Lib/test/test_enum.py
--- a/Lib/test/test_enum.py	Mon Sep 09 18:48:24 2013 -0500
+++ b/Lib/test/test_enum.py	Tue Sep 10 17:06:15 2013 +0800
@@ -1019,6 +1019,26 @@
                 blue = 3
                 grene = 2
 
+    def test_reversed(self):
+        class PlanetDistanceInAU(Enum):
+            MERCURY =  0.31
+            VENUS   =  0.72
+            EARTH   =  1.00
+            MARS    =  1.52
+            JUPITER =  5.20
+            SATURN  =  9.54
+            URANUS  = 19.22
+            NEPTUNE = 30.06
+        self.assertEqual(list(reversed(PlanetDistanceInAU)),
+                [PlanetDistanceInAU.NEPTUNE,
+                 PlanetDistanceInAU.URANUS,
+                 PlanetDistanceInAU.SATURN,
+                 PlanetDistanceInAU.JUPITER,
+                 PlanetDistanceInAU.MARS,
+                 PlanetDistanceInAU.EARTH,
+                 PlanetDistanceInAU.VENUS,
+                 PlanetDistanceInAU.MERCURY])
+
     def test_init(self):
         class Planet(Enum):
             MERCURY = (3.303e+23, 2.4397e6)